Clear (re-lock) an achievement for a player via the partner API. Intended for dev/test use. Requires a publisher API key with server IP allowlisted in Steamworks partner settings.
AI agents call steam_clearAchievement to permanently remove resources in Steam MCP Server — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
This tool irreversibly modifies a player's achievement state by resetting/re-locking an earned achievement. While technically a 'write' action, clearing an achievement removes earned progress that may not be recoverable in normal gameplay, making it destructive in nature. The requirement for a publisher API key and partner credentials further signals this is a privileged, high-impact operation.
From the tool's definition Clear (re-lock) an achievement for a player via the partner API
Attacks that exploit this kind of access
Clear (re-lock) an achievement for a player via the partner API. Intended for dev/test use. Requires a publisher API key with server IP allowlisted in Steamworks partner settings. It is categorised as a Destructive tool in the Steam MCP Server MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Steam MCP Server MCP server in PolicyLayer and add a rule for steam_clearAchievement: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Steam MCP Server. Nothing to install.
steam_clearAchievement is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.
Yes. Add a rate_limit block to the steam_clearAchievement rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for steam_clearAchievement. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
steam_clearAchievement is provided by the Steam MCP Server MCP server (tmhsdigital/steam-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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